Display errors in Minecraft?

I've been playing Minecraft for ages. The last time I started the game, I noticed something and that the water looks strange. Also areas that are a little further away. The individual blocks have a frame. The water looks similar…

Have you ever restarted the game + launcher?
Is it a mod to blame?
Or a shader?
Or do you have any settings in Minecraft that could trigger this? (I think there aren't any)
Computer restarted?
Installed updates for Minecraft?
Minecraft reinstalled?

Everything yes

So I did everything, deleted all folders. Game reinstalled etc

You could write to support, if there's one. 🤔

Press the F3 and a keys on your keyboard.

Maybe this will work.

Turn anti-aliasing in the Minecraft graphics settings (Video Settings). If that doesn't help, try anisotropic filtering.